CMT2380F64
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Rev 0.3 | 54 / 83
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EMPTY
FULL
TX_FIFO_NMTY
TX_FIFO_TH
TX_FIFO_FULL
Sync
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TX DATA
Prefix
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FIFO ARRAY
(FIFO_TH = 16)
Pream
Figure 4-9. Transceiver TX FIFO Interrupt Sequence Diagram
4.11.3
Transceiver working status, timing and power consumption
⚫
Startup time
After the transceiver is powered on RF-VDD, it usually needs to wait for about 1ms until POR released. After the RELEASE of POR, the
crystal will also start. The startup time is assumed to be N ms, which depends on the characteristics of the crystal itself. After startup, it is
necessary to wait for the crystal to stabilize the system before starting to work. The default stability time is 2.48 ms, which can be written
to XTAL_STB_TIME <2:0>; After modification, the chip will stay in IDLE state until the crystal is stable. After the crystal is stable, the chip
will leave IDLE and start to do the calibration of each module. After the calibration, the chip will stay in SLEEP, waiting for the user to
initialize the chip. The chip returns to IDLE and starts the power-on process again
POR
RF-VDD
POR Release
<= 1 ms
XTAL Stablize
<= 2.48 ms
Block Calibrations
<= 6.5 ms
Enters the SLEEP State Ready
for customer initializing
XTAL Start up
<= N ms
Figure 4-11. Power on timing
The chip enters SLEEP state after calibration. And then, the MCU can control the chip to switch to different operation states through
setting the register CHIP_MODE_SWT<7:0>.
⚫
Operation State
CMT2380F64 has 7 operation states: IDLE, SLEEP, STBY, RFS, RX, TFS and TX, as shown below.
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